scholarly journals Application of AHP-GRA in safety evaluation of blasting flying stones

2021 ◽  
pp. 19
Author(s):  
Keyword(s):  
Evaluation Model ◽  
Safety Evaluation ◽  
Correlation Method ◽  
Warning Signal ◽  
First Grade ◽  
Evaluation Index ◽  
Practical Significance ◽  
Risk Level ◽  
Safety Level ◽  
Correlation Degree

Blasting flying stone is one of the six hazards in rock and soil blasting construction. In order to determine the risk level of blasting flying stone, 3 first-grade indexes such as blasting design and construction are selected, and 11 second-grade indexes such as warning range are not set, so as to establish the blasting flying stone safety evaluation model of AHP-GRA. The analytic hierarchy process (AHP) was used to calculate the weight of the evaluation index. The grey correlation method was used to determine the correlation degree between the blasting flying stone and the safety level of an airport. The risk level of an airport was calculated based on the weight of the evaluation index, and the engineering verification was carried out. The results show that there is no warning signal, no notice before detonation and the warning range is too small, which are the main factors of the flying stone accident. The model presented in this paper is used to evaluate the blasting flying stones in an airport, and the evaluation results are basically consistent with the reality. It can be seen that the evaluation model can scientifically and reasonably evaluate the risk level of blasting flying stones, which has important practical significance.

Application of Analytic Hierarchy Process in Bridge Safety Comprehensive Evaluation

2015 ◽  
Vol 744-746 ◽  
pp. 744-748 ◽  
Author(s):  
Jun Li Wang
Keyword(s):  
Analytic Hierarchy Process ◽  
Safety Management ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Index ◽  
Analytic Hierarchy ◽  
Safety Level ◽  
Bridge Safety ◽  
Safety And Reliability ◽  
Hierarchy Process

In order to appraise the safety and reliability of bridges effectively, the comprehensive evaluation model based on analytic hierarchy process was established. The weight of evaluation index was calculated by using the model, and each evaluation index was given score by experts according to actual circumstances, and, on this basis, safety level of the bridge was obtained. And, afterwards, the model was applied to an engineering example for Huangjiaba Bridge. The results show that the evaluation level of bridge safety is third-level, with serious problems existing in this practical example, and the corresponding measures are proposed, which can provide scientific reference for bridge safety management.

Study of the Safety Evaluation of Urban Subway Operation Based on Extenics

2014 ◽  
Vol 919-921 ◽  
pp. 878-882
Author(s):  
Shi Mei Bai ◽  
Hong Sheng Sun ◽  
Yong Chun Zhao
Keyword(s):  
Risk Factors ◽  
Index System ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Extension Method ◽  
The Core ◽  
Multi Level

In this context, firstly, the safety evaluation index system of subway operation is established on the basis of the recognition and analysis of risk factors. Then, the paper constructs the multi-level extensible evaluation model for subway operation safety with the extension method as the core. Finally, Beijing Changping subway is studied as an example. The risk degrees of the line and its subsystems are determined. A new method for comprehensive evaluation of subway operation safety in china is put forward.

Research on safety evaluation of civil aircraft based on the grey clustering model

2018 ◽  
Vol 8 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Bentao Su ◽  
Naiming Xie
Keyword(s):  
Safety Assessment ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Evaluation Index System ◽  
Safety Level ◽  
Content Type ◽  
Aircraft Manufacturing ◽  
Clustering Model ◽  
Grey Clustering ◽  
Civil Aircraft

Purpose The purpose of this paper is to construct a grey clustering model based on the nonlinear whitenization weight function and to assess the safety of civil aircraft by using a quantitative method. Design/methodology/approach According to the running stage of civil aircraft safety assessment issues, first the civil aircraft safety evaluation index system is constructed by using a qualitative method. Taking the information duplication between indicators, the grey relational analysis method is used to filter the key indicators, then the grey clustering evaluation model of nonlinear whitening right function is built to evaluate the safety of civil aircraft and the algorithm steps of the evaluation model are given. Finally, the model is validated by collecting the parameters of nine different civil aircrafts at home and abroad. Findings The results show that the safety level of different types of aircraft is different due to the different index parameters, and to some extent, explain the rationality and scientificity of the method proposed in this paper to solve the problem. Practical implications This paper gives a complete set of security assessment methods, which can be used to evaluate the security of civil aircraft in the operational phase quantitatively, scientifically and reasonably. Furthermore, it can be extended to other complex system security or stability assessment issues. Originality/value It not only provides the supplement and perfection of the safety assessment method in the theoretical system to a certain extent, but also provides a theoretical guidance to solve the problem of civil aircraft system safety assessment of civil aircraft manufacturing enterprise all over the world. At the same time, the nonlinear grey clustering evaluation model constructed in this paper is an improvement of the traditional model, which is, to some extent, the improvement of the grey clustering evaluation theory.

scholarly journals The Construction and Research of Football Evaluation Index System

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Mengwei Qiao
Keyword(s):  
Performance Evaluation ◽  
Analytic Hierarchy Process ◽  
Performance Indicators ◽  
Evaluation Model ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Practical Significance ◽  
Expert Consultation ◽  
Analytic Hierarchy ◽  
Hierarchy Process

In order to establish the evaluation model of football performance indicators, this paper refers to the literature and determines the performance evaluation indicators such as the diversity of matches, players' contribution, flexibility, adaptability, coordination and tempo among players through expert consultation. Next, the paper uses analytic hierarchy process to determine the weight of each indicator. The study is of practical significance for the comprehensive and reasonable evaluation of football performance level.

scholarly journals Based on Fuzzy Bayesian Network of Oil Wharf Handling Risk Assessment

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Zhiqiang Hou ◽  
Peng Zhao
Keyword(s):  
Risk Assessment ◽  
Decision Making ◽  
Bayesian Network ◽  
Evaluation Model ◽  
Calibration Method ◽  
Analytic Network Process ◽  
Assessment Method ◽  
Practical Significance ◽  
Tree Model ◽  
Safety Level

In order to make the risk assessment method of oil wharf handling more reasonable, basic data calibration method more accurate, and assessment findings more objective, the fuzzy weights of the relative probability of basic events are calibrated by ANP decision-making (Analytic Network Process). ANP decision-making is appropriate for reflecting the dependence between the basic events and the feedback relationship. The calibration value is used as the probability value of each basic event. Based on the fault tree model, the relationship between the accidents caused by the Bayesian network is constructed, and the important degree of the basic events is quantitatively evaluated. The case focuses on wharf handling gasoline fire and explosions, using ANP method to calibrate probability, and analyzing and sorting the structural importance, the probability importance, and critical degree of each basic event through forward and backward reasoning. The results showed that the evaluation model can better characterize the effect of the basic events on the top events, which can be targeted to identify security weaknesses in oil wharf handling process. It has some practical significance for finding security risks and improving working conditions and the overall system safety level.

Safety Assessment Model for Expressway Based on Accident Mechanism

2014 ◽  
Vol 1030-1032 ◽  
pp. 2110-2114
Author(s):  
Li Li Lu ◽  
Gang Ren ◽  
Li Ming Lu
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Model ◽  
Analytic Hierarchy ◽  
Safety Level ◽  
Factors Affecting ◽  
Accident Mechanism ◽  
Hierarchy Process

It is of great significance to enhance freeway safety. This paper analyzed the factors affecting freeway safety systematically. Analytic hierarchy process (AHP) and fuzzy comprehensive evaluation (FCE) were applied to develop a freeway safety evaluation model. This model has a practical application on evaluate freeway safety level.

The Real-Time Wind Turbine Fault Diagnosis Method Based on Safety Evaluation Model

2014 ◽  
Vol 953-954 ◽  
pp. 453-457
Author(s):  
Ming Li Yang ◽  
San Ming Liu ◽  
Yong Hai Lv ◽  
Yang Zou ◽  
Guo Dong Ding
Keyword(s):  
Fault Diagnosis ◽  
Wind Turbine ◽  
Real Time ◽  
Wind Turbines ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Mean Value ◽  
Safety Level ◽  
Significance Level ◽  
The Real

In order to determine the best maintenance time of wind turbines and identify the fault type when it is the best time to do the diagnosis work immediately. The establishment of 4-level safety status model for critical parts of wind turbines, based on wind turbine parts’ significance level, was proposed. According to the corresponding safety level of the wind turbines in real-time working status, you can decide whether the wind turbine needs diagnosis at the time or not. Therefore, we should take measures to monitor the real-time working conditions of the wind turbine’s critical parts, confirming whether the critical part need the fault diagnosis analysis or not according to its real-time working safety status. If it is the right time, then the corresponding fault diagnosis process will be initiated, through which the real online fault diagnosis can be achieved. The multi-scale wavelet decomposition and Hilbert transformation was employed to get the useful parameters such as amplitude, effective value, mean value, kurtosis value and so on of the corresponding waveform to confirm the concrete diagnosis type.

Application of Projection Pursuit Clustering Method in the Evaluation of Coal Mine Safety

2011 ◽  
Vol 71-78 ◽  
pp. 4868-4871
Author(s):  
Zhang Lin Guo ◽  
Qing Ke Song ◽  
Jun E Liu
Keyword(s):  
Coal Mine ◽  
Evaluation Model ◽  
Recognition Rate ◽  
Projection Pursuit ◽  
Safety Evaluation ◽  
Mine Safety ◽  
Safety Level ◽  
Clustering Model ◽  
Coal Mine Safety ◽  
Objective Basis

An effective and general model — projection pursuit clustering model is proposed in this paper. It can solve the incompatible problems of indexes of safety evaluation，which are uncertain，fuzzy and complex. At the same time, it improves the recognition rate of the coal mine safety evaluation model. It uses genetic algorithms to find optimal solutions for the model, the information of which can be used to research the influence of all the indexes on the evaluation of coal mine safety. The paper clusters the safety level of each coal mine according to each projection value, which provides the objective basis for decision-making of the evaluation of coal mine safety. This paper combining with the example demonstrates operation process. It also proves the method is scientific and feasible, which is of significance of coal mine safety evaluation.

scholarly journals Digital Twin-based Safety Evaluation of Prestressed Steel Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Zhansheng Liu ◽  
Wenyan Bai ◽  
Xiuli Du ◽  
Anshan Zhang ◽  
Zezhong Xing ◽  
...  
Keyword(s):  
Safety Assessment ◽  
Safety Evaluation ◽  
Steel Structure ◽  
Steel Structures ◽  
Risk Level ◽  
Support Vector ◽  
Safety Level ◽  
Safety Risk ◽  
Digital Twin ◽  
Prestressed Steel Structure

The safety of prestressed steel structures in service has been studied widely. However, traditional safety assessment methods for prestressed steel structures involve few sample points, do not provide accurate predictions, and consume substantial human and material resources. The digital twin technology can be used to monitor the structural behavior, state, and activity of a steel structure throughout its life cycle, which is equivalent to performing a safety assessment of the structure. The purpose of this study is to establish a digital twin multidimensional model of prestressed steel structures. Based on this model, the support vector machine and prediction model are trained using the relevant structural history data, and the safety risk level of the structure is then predicted based on the measured data. Finally, a proportional reduction model of the wheel-spoke cable truss structure is used to verify the feasibility of the proposed method. The results show that digital twin technology can achieve real-time monitoring of prestressed steel structures in use and can provide timely predictions of the safety level. This represents a new method for the safety risk assessment of prestressed steel structures.

Safety Evaluation in Emulsion Explosive Continuous Manufacturing Based on Unascertained Measurement Model

2014 ◽  
Vol 1033-1034 ◽  
pp. 1354-1357
Author(s):  
Ya Jun Luo ◽  
Ming Sheng Zhao ◽  
En An Chi ◽  
Tie Jun Tao
Keyword(s):  
Evaluation Model ◽  
Measurement Theory ◽  
Safety Evaluation ◽  
Measurement Model ◽  
Evaluation Index ◽  
Continuous Manufacturing ◽  
Actual Situation ◽  
Emulsion Explosive ◽  
Uncertainty Measurement ◽  
Index Weight

In order to resolve the problems that many units are intersect and mutual restraint in the safety evaluation of emulsion explosive continuous manufacturing, the safety evaluation model based on uncertainty measurement theory was built, then this model was used to evaluate the safety of emulsion explosive continuous manufacturing in one explosive industry. The evaluation results show that: the information entropy and confidence identifying criterion were respectively used to ascertain the evaluation index weight and identifying criterion, by these ways, the evaluation results of this model are more objective; and the evaluation units can be selected flexibly according to actual situation, the calculation of evaluation model is simple, so the evaluation results can offer decision basis for explosive industry to make good management.

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